Python practice quiz 6

What will be the output of the following Python code snippet?

d = {"john":40, "peter":45}

print(d)

• “john”, 40, “peter”, 45

• {‘john’: 40, ‘peter’: 45}

• 40 and 45

• d = (40:”john”, 45:”peter”)

What will be the output of the following Python code snippet?

>>> d = {"john":40, "peter":45}

>>> "john" in d

• true

• false

• none

• eror

What will be the output of the following Python code snippet?

d1 = {"john":40, "peter":45}

d2 = {"john":466, "peter":45}

d1 > d2

• true

• false

• error

• none

Suppose d = {“john”:40, “peter”:45}, to delete the entry for “john” what command do we use?

• d.delete(“john”:40)

• d.delete(“john”)

• del d[“john”]

• del d(“john”:40)

What will be the output of the following Python code snippet?

d = {"john":40, "peter":45}

print(list(d.keys()))

• [“john”, “peter”]

• [“john”:40, “peter”:45]

• (“john”, “peter”)

• (“john”:40, “peter”:45)

Which of these about a dictionary is false?

• The values of a dictionary can be accessed using keys

• The keys of a dictionary can be accessed using values

• Dictionaries aren’t ordered

• Dictionaries are mutable

What will be the output of the following Python code snippet?

a={1:"A",2:"B",3:"C"}

print(a.get(1,4))

• 1

• A

• 4

• invalid syntax for get method

What will be the output of the following Python code snippet?

total={}

def insert(items):

if items in total:

total[items] += 1

else:

total[items] = 1

insert('Apple')

insert('Ball')

insert('Apple')

print (len(total))

• 3

• 1

• 2

• 0

What will be the output of the following Python code snippet?

test = {1:'A', 2:'B', 3:'C'}

del test[1]

test[1] = 'D'

del test[2]

print(len(test))

• 0

• 2

• 1

• Error as the key-value pair of 1:’A’ is already deleted

What will be the output of the following Python code?

nums = set([1,1,2,3,3,3,4,4])

print(len(nums))

• 7

• 4

• 8

• Error, invalid syntax for formation of set